Study On Biological Factors Of Gait Stability

Gait instability often occurs in daily life, especially in the elderly and among workers.The study of biomechanical factors of gait stability can put forward to prevent slippery strategy, provide data support for lower limb help line device. For gait instability phenomenon, the domestic and foreign scholars have done a lot of research work. But there is no modeling simulation and considering research of muscle force. In this paper, we adopted the combination of test, simulation and modeling method. Independent study gait instability in the process of rebalancing, law of biomechanical factors of lower limb, further optimize antiskid strategy.Recruiting 10 subjects, this paper requires every subjects respectively walking under dry and wet two medium according to the normal walking pace. Using of 3 d motion capture Vicon system, force board, plantar pressure measurement and control system and system respectively collected multi-channel sEMG gait behavior (stable gait and slipping gait) images, plantar pressure, kinematics and dynamics parameter data and the data of multi-channel sEMG, AnyBody modeling simulation system is adopted to establish the model of lower limb, getting lower limb muscle activity and muscle force, joint Angle,joint torque. As a result, the parameters, such as lower limb seven bar model is set up finally, put forward to simulate the muscle force into the model validation method.Through screening and analysis of experimental data and theoretical analysis, this paper can get a conclusion:Sliding in the process of recovery, human need more the ground reaction force, and walk on the surface of the oil, the peak of the ground reaction force is greater.Related parameters is obtained by experiment and simulation results of the analysis, it is concluded that ankle toe flexion movement, knee flexion movement and autonomous recovery after hip stretching helps to smooth.Autonomous recovery process of a slip, ankle plantar flexion muscle group, knee flexion muscles and hip extensor muscle group of muscle force is bigger, the corresponding flexor we is small, can be obtained at the same time, the strands of rectus muscle in both cases.This research puts forward a simplified muscle, seven bar model, the muscle force into the research of dynamic balance method.Based on gait stability for the further study of the biomechanical factors, muscle force,provides a method for quantitative analysis of gait stability factor, more specific put forward the prevent slippery strategy, can the study of power type help line device parameter quantitative analysis, at the same time, also can recover for assistive devices such as medical, walk to provide more detailed theory basis.